Cited by 58Diabetes Treatment and ManagementBarrier Structure and Function StudiesNeuropeptides and Animal Physiology

Glucagon-like peptide-1 protects mesenteric endothelium from injury during inflammation

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Dozier, Kristopher C., Cureton, Elizabeth L., Kwan, Rita O., Curran, Brian, Sadjadi, Javid, Victorino, Gregory P.·2009·Peptides

Abstract

Glucagon-like peptide-1 (GLP-1) is a proglucagon-derived hormone with cellular protective actions. We hypothesized that GLP-1 would protect the endothelium from injury during inflammation. Our aims were to determine the: (1) effect of GLP-1 on basal microvascular permeability, (2) effect of GLP-1 on increased microvascular permeability induced by lipopolysaccaride (LPS), (3) involvement of the GLP-1 receptor in GLP-1 activity, and (4) involvement of the cAMP/PKA pathway in GLP-1 activity. Microvascular permeability (L(p)) of rat mesenteric post-capillary venules was measured in vivo. First, the effect of GLP-1 on basal L(p) was measured. Second, after systemic LPS injection, L(p) was measured after subsequent perfusion with GLP-1. Thirdly, L(p) was measured after LPS injection and perfusion with GLP-1+GLP-1 receptor antagonist. Lastly, L(p) was measured after LPS injection and perfusion with GLP-1+inhibitors of the cAMP/PKA pathway. Results are presented as mean area under the curve (AUC)+/-SEM. GLP-1 had no effect on L(p) (AUC: baseline=27+/-1.4, GLP-1=1+/-0.4, p=0.08). LPS increased L(p) two-fold (AUC: LPS=54+/-1.7, p<0.0001). GLP-1 reduced the LPS increase in L(p) by 75% (AUC: LPS+GLP-1=34+/-1.5, p<0.0001). GLP-1 antagonism reduced the effects of GLP-1 by 60% (AUC: LPS+GLP-1+antagonist=46+/-2.0, p<0.001). The cAMP synthesis inhibitor reduced the effects of GLP-1 by 60% (AUC: LPS+GLP-1+cAMP inhibitor=46+/-1.5, p<0.0001). The PKA inhibitor reduced the effects of GLP-1 by 100% (AUC: LPS+GLP-1+PKA inhibitor=56+/-1.5, p<0.0001). GLP-1 attenuates the increase in microvascular permeability induced by LPS. GLP-1 may protect the endothelium during inflammation, thus decreasing third-space fluid loss.

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Crossref · 10.1016/j.peptides.2009.06.019

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Authors
Dozier, K. C., Cureton, E. L., Kwan, R. O., Curran, B., Sadjadi, J., & Victorino, G. P.
Affiliations
University of California, San Francisco (US)
Corresponding author
Victorino, Gregory P.
Venue
Peptides
Publisher
Elsevier BV
Published
2009-09
Volume
30
Issue
9
Pages
1735-1741
ISSN
0196-9781 (ISSN-L)
OpenAlex
W2050489626
Cited by
58
References
42
Citations by year
2026: 3 · 2025: 2 · 2023: 1 · 2022: 2 · 2021: 1 · 2019: 5 · 2018: 6 · 2017: 5 · 2016: 3 · 2015: 1 · 2014: 6 · 2013: 6 · 2012: 9
FWCI
4.11
Type
journal article
Language
en
Open access
Locations
  • Peptides (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of General Medical Sciences (K08GM081361)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
Keywords
glucagon-like peptide-1, endothelial injury, inflammation, lipopolysaccharide, microvascular permeability, GLP-1 receptor, cAMP/PKA signaling, postcapillary venules, endothelial protection, PKA inhibitors, GLP-1 receptor antagonists
MeSH terms
Glucagon-Like Peptide-1 Receptor, Cyclic AMP, Animals, Capillary Permeability, Endothelium, Vascular, Enzyme Inhibitors, Female, Inflammation, Isoquinolines, Lipopolysaccharides, Mesentery, Peptide Fragments, Perfusion, Sulfonamides, Venules, Dideoxyadenosine, Rats, Sprague-Dawley, Cyclic AMP-Dependent Protein Kinases, Receptors, Glucagon, Rolipram, Protein Kinase Inhibitors, Rats, Glucagon-Like Peptide 1

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